【文章內(nèi)容簡(jiǎn)介】 cks below 5t. It is widely used as lightweight trucks, for example Dongfeng 3092F uses this lifting mechanism. See Patent: US4036528. 圖4The multistage cylinder centrallymounted straight top type—— it improves the disadvantages of the single cylinder centrallymounted straight top type. It improves the condition of the cylinder and the frame to extend their lifetime and reduces the inside discharge of the cylinder. But the framework design is difficult. It makes the hydraulic system plex and costs a lot, so it is not monly used. See Patent: US4056283.圖5The single cylinder connecting rod bined type—— it has the stable lifting ability, strong overloading ability and good hydraulic characteristics. It can be changed into different style through changing the fourbar linkage. Mallory type is one of the types and widely used in China because of the characteristics of small cylinder diameters and long cylinder routes. But some types is not widely used because of big cylinder diameters and short cylinder routes. See Patent: US4168861.圖6The multistage cylinder lead straight top type—— is made up of one multistage cylinder whose route can be 5 to 6 meters. It is the simplest lifting mechanism and largely improves the stability of the truck. It is the development direction of the dump truck. But its cost is the most expensive, which restricts its development in China. See Patent: US5033794, US6382731.圖7The future of Dump Trucks in ChinaMost of the dump trucks in China use the single cylinder connecting rod bined type, from the single cylinder centrallymounted straight top type and the multistage cylinder centrallymounted straight top type. The trend of development is the multistage cylinder lead straight top type and the type will be developed, but we can’t see a lot in China. We believe in the distant future it can quickly be developed and used in our country. The front multilevel cylinder lifting mechanism is the leading direction of dump truck manufacturing. For now, the dump trucks in our country are bothered by two main problems: high gravity center and heavy dead weight. To overe these two obstacles, the younger generation and the technical engineers need to work hard to improve the peting ability of our production.All in all, the key point is to improve the quality of our products.（2）專利列表Patent ListPatent No.App TimePatent NameInventorDrawing FiguresBrief DiagramThe TypesUS2094521LIFTING MECHANISM FOR DUMP BODIESF. BISZANTZ et alInvention Patent。Eightbar LinkageUS2449202HYDRAULIC ACTUATING MECHANISM FOR DUMP TRUCKSClaims. (Cl et alInvention Patent。Fourbar LinkageUS2593776DUMP BODY TILTING MECHANISMCharles E. Margala et alInvention Patent。Sixbar LinkageUS2849255HOIST MECHANISM FOR DUMP TRUCKSGerald J. Pasker et alInvention Patent。Sixbar LinkageUS3172703DUMP MECHANISM FOR TRUCKSJoan A. ByerInvention Patent。Sixbar LinkageUS3512836LATERAL STABILIZING MEANS FOR A SEMITRAILER DUMP BODYAnthony Policfa et alInvention Patent。Eightbar LinkageUS3620458ALBERT RATH XYSteel Products Ltd. Preston et alUtility Model Patent。Sixbar LinkageUS4036528Truck with tiltable bodyHeinrich LangendorfInvention Patent。Fourbar LinkageUS4049316Lifting mechanisms for truck bodiesMarino Paneda OrdonezInvention Patent。Sixbar LinkageUS4052105Truck hoistWalter MoeInvention Patent。Sixbar LinkageUS4066296Truck bed tilting mechanismLouis M. Ray, Jr. et alInvention Patent。Sixbar LinkageUS4056283Truck constructionRobert Marvin PowUtility Model Patent。Sixbar LinkageUS4168861Dumphoist conversion systemOllie J. CarrollUtility Model Patent。Sixbar LinkageUS4302050Truck hoistEldon D. JonesUtility Model Patent。Sixbar LinkageUS4382632Dumping vehicle stabilizer systemCharlie C. PittsUtility Model Patent。Sixbar LinkageUS4531780Lift mechanism for a dump truckBruce M. BoczkiewiczUtility Model Patent。Sixbar LinkageUS4592593Scissor frame lift apparatus for dump trucksGlenn L. ChannellInvention Patent。Sixbar LinkageUS5048896Minimum profile hoistGlenn L. ChannellUtility Model Patent。Sixbar LinkageUS5033794Securing device for dump truckHenry L. VickUtility Model Patent。Fourbar LinkageUS5203668Apparatus for loading and unloading of a container structure or other loads ...Lazar MarmurUtility Model Patent。Sixbar LinkageUS5195385Free ranging bidirectional hydraulic dumping mechanismJerome A. JohnsonUtility Model Patent。Sixbar LinkageUSRE34733Scissor frame lift apparatus for dump trucksGlenn L. ChannellUtility Model Patent。Sixbar LinkageUS5513901Hoist mechanismFred P. Smith et aInvention Patent。Eightbar LinkageUS5967733Hydraulic tilt trailerRussell CashUtility Model Patent。Sixbar LinkageUS6156596Truck hoistEldon D. JonesUtility Model Patent。Sixbar LinkageUS6382731Load hauling vehicle with sidewall raising and lowering mechanismMichael Slut